Sergey came somewhat out over the stated deadlines, but in general left an unpleasant impression.

With the plus:
He has done his part of his work and has corrected his mistakes.
- Even taking into account different time zones and day mode, it still tries to be in communication.
He has good Python skills and functional programming.
From the Minus:
“I didn’t calculate my own strength, instead of 3 days I was engaged in the project for almost 2 weeks, it was lucky that I had a certain amount of time.
- Not very careful, makes small mistakes (not checking the work before sending because the program is not running).
The work was related to the OOP, unfortunately, he has a weak knowledge on this topic.
It works mainly at night, it doesn’t always come out to be in touch at the same time.

I wish you success in my business, I recommend you to cooperate!